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Intermittently actuated portable signal
US 2,634,407 A
Filed
: 03/06/1950
Issued
: 04/07/1953
Est. Priority Date
: 03/06/1950
Status: Expired due to Term
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Current Assignee
Donald U. Johnson
Original Assignee
Donald U. Johnson
Inventors
Johnson, Donald U.
Application Number
US03/147,873
Time in Patent Office
1,128 Days
Field of Search
US Class Current
340/321
CPC Class Codes
F21L 4/00
Electric lighting devices w...
F21V 23/0414
specially adapted to be use...
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